利用spring 3.0+springMVC+dwr 3.0 实现一对一的无刷新聊天(一)

一、导入相关的jar包；

二、修改配置文件：

1、修改web.xml文件：

<!-- 加载Spring容器配置 -->

  <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>/WEB-INF/classes/applicationContext-beans.xml</param-value>

  </context-param>

<listener>

        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>

</listener>

<listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <listener>

        <listener-class>org.springframework.web.context.ContextCleanupListener</listener-class>

    </listener>

    <servlet>

        <servlet-name>springMVC</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>springMVC</servlet-name>

        <url-pattern>*.do</url-pattern>

    </servlet-mapping>

    <!-- 配置dwr监听器 -->

    <listener>

        <listener-class>org.directwebremoting.servlet.DwrListener</listener-class>

    </listener>

    <servlet>

        <servlet-name>dwr-invoker</servlet-name>

        <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>

        <init-param>

            <param-name>debug</param-name>

            <param-value>true</param-value>

        </init-param>

        <!-- dwr的comet控制 -->

        <init-param>

            <param-name>pollAndCometEnabled</param-name>

            <param-value>true</param-value>

        </init-param>

        <init-param>

            <param-name>crossDomainSessionSecurity</param-name>

            <param-value>false</param-value>

        </init-param>

        <init-param>

            <param-name>allowScriptTagRemoting</param-name>

            <param-value>true</param-value>

        </init-param>

    </servlet>

    <servlet-mapping>

        <servlet-name>dwr-invoker</servlet-name>

        <url-pattern>/dwr/*</url-pattern>

    </servlet-mapping>

2、在src下创建applicationContext-beans.xml，配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/
4000
schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
</beans>3、在WEB-INF下创建springMVC-servlet.xml文件，配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

<context:component-scan base-package="com.dwr.web" />
<mvc:annotation-driven />
<mvc:resources mapping="/static/**" location="/WEB-INF/static/"/>
<mvc:default-servlet-handler/>

<!-- 对转向页面的路径解析。prefix：前缀， suffix：后缀 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>

</beans>

4、在WEB-INF下创建dwr.xml文件，配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr/dwr30.dtd">
<dwr>
<allow>
</allow>
</dwr>